Display screen or portion thereof with a graphical user interface



This application is related to the following commonly owned co-pendingpatent application: U.S. application Ser. No. 29/743,415, entitled“DISPLAY SCREEN OR PORTION THEREOF WITH A GRAPHICAL USER INTERFACE,”.

FIG. 1 is a front view of a display screen or portion thereof with agraphical user interface; and,

FIG. 2 is a front view of a second embodiment thereof.

The dot dashed broken line showing the display screen or portion thereofforms no part of the claimed design. The dashed broken line showingportions of the graphical user interface form no part of the claimeddesign.

CLAIM The ornamental design for a display screen or portion thereof witha graphical user interface, as shown and described herein.